Frictional Energy Dissipation in a Rough Hertzian Contact
Frictional Energy Dissipation in a Rough Hertzian Contact
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DOI：
10.1115/1.3063697
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发表时间：
2009-04-01
影响因子：
2.5
通讯作者：
Hills, D. A.
中科院分区：
文献类型：
--
作者：
Dini, D.;Hills, D. A.
当法向载荷恒定且施加小于引起滑动所需的振荡剪切时，球体被压在弹性相似的半空间上，该半空间的表面由均匀的球形凹凸体阵列填充，发现了界面接触压力和剪切牵引力分布。发现了外滑动环和内盘中的粗糙度所承受的负载历史的细节，其中它们经历了部分滑动，以及粗糙度对整体切向柔量和摩擦能量损失的影响。结果表明，对于所选参数的示例组合，在轻剪切载荷下，在相同的载荷历史条件下，粗糙接触吸收的能量比光滑接触吸收的能量少，但对于较大的剪切力，情况正好相反。
The interfacial contact pressure and shear traction distributions are found for a sphere pressed onto an elastically similar half-space whose surface is populated by a uniform array of spherical asperities, when the normal load is constant and an oscillatory shear, less than that needed to cause sliding, is imposed. Details of the load history suffered by asperities in an outer sliding annulus and an inner disk, where they experience partial slip, are found, together with the effects of the roughness on the overall tangential compliance and the frictional energy losses. It is shown that for the example combination of parameters chosen, under light shear loads, the rough contact absorbs less energy than a smooth one subject to the same loading history, but that for larger shearing forces the reverse is true.